Set of headphones with green and grey details



FIG. 1 is a perspective view of a set of headphones with green and grey details with a control module as seen from the front, bottom, and left side; the drawing includes a color legend;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top end view thereof; and,

FIG. 7 is a bottom end view thereof.

The dotted line portions of the drawings represent environmental structure only and do not form part of the claimed design. 

CLAIM The ornamental design for a set of headphones with green and grey details, substantially as shown and described. 